US2696994A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flexible pipe coupling
Assignee: Spence Engineering Co Inc
•
Filing: 1949-10-11
•
Granted: 1954-12-14
•
Expires: 1969-10-11
Abstract
No abstract record available.
Inventors
- 👤 Spence Paulsen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:33
CPC Classifications
F; F16; F16L; F16L21/00; F16L21/002; F16L21/005; F16L33/00; F16L33/02; F16L33/04; F16L33/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US649916A
Cited
US833426A
Cited
US863571A
Cited
GB190904974A
Cited
US1220223A
Cited
US1785638A
Cited
US2291802A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-12-13 | 1958-06-14 | 1958-12-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-12-13 | 1962-06-14 | 1962-12-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-12-13 | 1966-06-14 | 1966-12-14 | $7700.00 | Window Closed / Lapsed |